<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="js/vue.js"></script>
</head>
<body>
    <div id="app">
        <input type="text" v-model="msg">
        <!--使用过滤器-->
        {{msg|upperCase|asterisk}}
    </div>
    <div id="app2">
        <input type="text" v-model="msg">
        <!--使用过滤器-->
        {{msg|upperCase|asterisk}}
    </div>
</body>
<script>
    var app = new Vue({
    el:'#app',
    data:{
        msg:''
    },
    filters:{
        upperCase:function(val){
            return val.toUpperCase();
        },
        asterisk:function(val){
            var reg = ^d/g;
            return val.replace(reg, '*');
        }
    }
})
    var app2 = new Vue({
    el:'#app2',
    data:{
        msg:''
    }
})
</script>
</html>